Accessibility information

Developing for accessibility involves many judgement calls,
and I value practical feedback —
if you have any problems with this site, or find any
areas which are difficult or impossible to access or use, please do
let me know.

Page Semantics

All the content on this website is properly structured into headings,
paragraphs and other meaningful HTML
semantics. If your browser or reader has a headings-reading mode or equivalent, you
can use this to skip through the major sections of any page.

Groups of related links are generally organised into lists, and content which
falls easily into name/value pairs is generally marked up using definition-lists.

Page Text

If you find that the text is too small for you to read,
you can change it to a size you're more comfortable with:

In Opera, use the Zoom selector.

In Firefox and other Mozilla browsers,
use the View - Increase Text Size option.

In Safari, use the View - Make Text Bigger
option.

In Macintosh
Internet Explorer, and
Netscape 6 and 7, use the
View - Text Zoom menu.

If you use a wheel-mouse, you may be able to change the text
size by holding down the Control or Command
key and turning the wheel.
In some browsers you can change the text size using
Control or Command
and the + and - keys.

Page Styles

All the visual styling on this website is implemented using
Cascading Style Sheets (CSS),
so that you can override some or all of the sites appearance
with your own user stylesheets.

The site also features a
stylesheet switcher, from where you can
choose from a range of design and access-oriented stylesheets,
and even specify your own colour scheme:

The Design choices feature the default, soft green and yellow design
[default],
and then a version of that design with a simulated red/green colour deficiency
[deuteranopic];
or for those who like something a little sharper, there's an inverted purple on very-dark blue
[inverted].

The Minimal styling options allow you apply no colours or fonts
at all while preserving the physical layout
[no colours or fonts];
this is so that your browser's accessibility preferences can show through,
but without losing the formatting of columns and boxes.
Or you can remove the stylesheets altogether, and fall-back on your browser's
native rendering
[no stylesheets].

For all the different design schemes you can further choose from a
two-column layout with the column on the left or right
[left,
right],
or you can switch to a single-column zoom layout[zoom layout];
the zoom layout may be useful if you browse with very large text, since
a single column gives more room for scaling without creating horizontal
scrollbars.

Stylesheet switcher

Colour scheme

Custom colours (000–FFF)

Background#

Foreground#

Page layout

Top navigation right column

Top navigation left column

Zoom layout

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Search for:

Our internal search engine is currently offline,
undergoing some configuration changes in preparation for
a major site overhaul. In the meantime, you can still
search this site using Google Custom Search.